EP3618089A2 - Pyrotechnic current disconnector - Google Patents
Pyrotechnic current disconnector Download PDFInfo
- Publication number
- EP3618089A2 EP3618089A2 EP19194918.9A EP19194918A EP3618089A2 EP 3618089 A2 EP3618089 A2 EP 3618089A2 EP 19194918 A EP19194918 A EP 19194918A EP 3618089 A2 EP3618089 A2 EP 3618089A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal line
- conductor
- current isolator
- housing
- igniter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000001960 triggered effect Effects 0.000 claims abstract description 6
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- 238000000926 separation method Methods 0.000 description 10
- 238000009413 insulation Methods 0.000 description 5
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 3
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- 230000002787 reinforcement Effects 0.000 description 3
- 101100522042 Oryza sativa subsp. japonica PSS3 gene Proteins 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
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- 230000005611 electricity Effects 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
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Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
- H01H39/006—Opening by severing a conductor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/0066—Auxiliary contact devices
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
- H01H2039/008—Switching devices actuated by an explosion produced within the device and initiated by an electric current using the switch for a battery cutoff
Definitions
- the present invention relates to a pyrotechnic current isolator which has a housing with an igniter which, in order to separate a conductor, pressurizes a separating piston which is displaceable in the housing, a signal line also being interrupted when triggered.
- Electric and hybrid vehicles BEV and hybrid vehicles are currently seen as a possible solution, with the greatest growth predicted for the latter.
- the advantage of hybrid vehicles is that a motor / generator element is used for the frequent starting and braking processes, which has a high degree of efficiency when starting and returns the energy to the energy storage when braking.
- This electricity storage which is small compared to a fully electric vehicle, nevertheless has a very high short-circuit current, which must be reliably switched off in the event of damage.
- Autokowski uses a magnet in the separating piston for this, which triggers an external magnetic switch.
- a signal cable is provided in Autoliv's PSS3, which is to be cut in addition to the conductor during the disconnection process.
- a top plate is provided, which provides a guide for the signal line. Cutting the signal cable is used to prove that the conductor has been cut.
- the piston has a protruding nose for the signal cable, under which the signal cable is arranged. The signal cable is fixed in the top plate on both sides of the nose.
- a loop can be attached to the housing with significantly less manufacturing effort. However, with a normal piston - even if it has a nose - there is a risk that the loop will be pressed into the small gap between the piston and the housing and will not be severed. As a result of the pin of the separating piston engaging in the loop, however, this is reliably prevented.
- the separating device is preferably designed such that the signal line is only cut after the conductor has been separated. In this way it is impossible that "conductor separated" is incorrectly signaled.
- the piston After severing the conductor and severing the signal line, the piston preferably serves as insulation for both the interrupted conductor and the interrupted signal cable. In this way it is impossible for the signal line to bridge the separation point of the conductor.
- the signal line has sufficient mechanical stability, i.e. is sufficiently thick, it is often sufficient if the separating piston is only fixed in position by the pin engaging in the loop. Otherwise, it is preferred for fixing the position that the separating piston is positioned relative to the conductor by at least one web.
- the housing is composed of an upper part and a lower part, the igniter being molded around with the upper part, as is the case with WO 2017/066816 A is known.
- the electrical connection of the ignition circuit of the current isolator can take place, for example, as a pin type or lead wire variant.
- the lead of the igniter is also overmolded.
- the signal line can be formed in one piece.
- the signal line can be overmolded with the lower part. In this way, the assembly is possible without any problems, because when the lower part is placed on the upper part in which the piston is located, the loop wraps around the piston pin. However, a common plug for the igniter, which is in the upper part, and the signal line, which is in the lower part, is then not possible.
- the signal line is overmolded with the upper part, the loop emerging from the separating surface to the lower part and being guided between the upper part and lower part to the separating piston.
- the assembly can be carried out in such a way that the signal line first emerges from the upper part parallel to the direction of movement of the piston, then the piston is inserted, whereupon the loop is bent by 90 ° onto the trend surface between the upper part and lower part and thereby around the pin of the Piston comes to rest. Then the lower part can be attached.
- a favorable further training is that with this Embodiment the signal line and the igniter have a common connector for connection. This ensures a more economical manufacturing process and is made possible, among other things, by the fact that no additional top plate is required as with PSS3 from Autoliv. It is particularly favorable if the plug is part of the housing.
- both the signal line and the ignition line emerge from the housing parallel to the conductor level. This is favorable for a space-saving installation and can be used both when the signal line is overmolded in the upper part and when it is overmolded in the lower part.
- the signal line can have many cross-sectional shapes, but a rectangular cross-section is preferably used. This means that the signal line around the pin comes to rest flat.
- Fig. 1 a current isolator according to the invention in section
- Fig. 2 a variant thereof with a different braking of the separating piston
- Fig. 3 a current isolator with integrated signal line, which is also disconnected when the pyrotechnic switch is triggered, in a section that compared to 1 and 2 is rotated by 90 °
- Fig. 4 the isolating piston of the current isolator from Fig. 3 in perspective view.
- a current isolator 1 has a conductor 2 with conductor sections 3a, 3b, the conductor 2 being able to be fixed in the housing through holes 4a, 4b.
- the housing consists of an upper part 5 and a lower part 6. In the upper part there is an igniter 7 and a separating piston 8 with a groove 9 which contains an O-ring 10.
- the conductor 2 has two predetermined breaking points 11a, 11b in the interior of the housing, which delimit a central section 12. If this section 12 is separated from the conductor 2, it is also called a circuit board. So far the design corresponds to the existing concepts.
- circuit board In order to prevent the separated circuit board from coming into contact again, it is necessary for the circuit board to be held in place in the lower part 6 after the current isolator 1 has been triggered.
- These structural elements can, for example, have a knob-like design.
- the separating piston 8 preferably has a concave cutting surface, which enables a clean separation of the conductor 2.
- the conductor 2 has a larger width outside the housing than at the separation points.
- the upper part 5 and the lower part 6 are held together by screws 13a, 13b, which lead through the conductor 2 and thus not only fix the conductor 2 and hold the housing halves together, but also reinforce them. This means that additional metallic reinforcements can be omitted.
- insulation 14a, 14b can prevent contact between the screws 13a, 13b and the conductor sections 3a, 3b. This insulation can be part of the upper or lower part 5 or 6 or an independent part.
- the screws 13a, 13b are particularly preferably inserted from the side remote from the igniter, as a result of which the heads 15a, 15b of the screws 13a, 13b become a structural reinforcement of the lower part 6. As a result, the circuit board 12 punched out by the separating piston 8 during the separating process can be securely caught.
- the collecting chamber 16 for the circuit board 12 is conical, so that when the circuit board 12 (and possibly the separating piston 8) is braked, a bending moment is generated on the screws 13a, 13b and these serve as structural reinforcement. This bending moment causes the screws to be pressed against the plastic in the transverse direction, which increases their axial holding force. In this design, the screws 13a, 13b can also be inserted from the igniter side.
- Screws with a plastic thread are preferred as screws. Compared to metric screws, these have a large pitch, significantly more material between the threads and one largely characterized axial loading of the carrier material. Screws with pull-out forces of at least 500 N are particularly preferred.
- the screws can be equipped with a safeguard against automatic loosening (for example in the event of vibration), for example by serrations or ribs on the screw head.
- the screws on the head can have a contour for transmitting the screwing-in and tightening torque, which becomes ineffective when a defined torque is reached, for example by tearing off part of the head. This effectively prevents disassembly.
- a seal 17 is provided, this is particularly preferably sprayed onto the conductor 2 and consists of conventional sealing materials, for example EPDM or TPE with approximately 70 Shore, the fixing of the conductor sections 3a also helps here , 3b during and after the separation process by the screws 13a, 13b to ensure tightness.
- Fig. 2 A further design is shown in which the separating piston 8 is designed as a stepped piston and the position of the predetermined breaking points 11a, 11b and the diameter of the collecting chamber 16 are adapted to the smaller diameter 19 remote from the igniter.
- the smaller diameter 19 remote from the igniter separates the central section 12 of the conductor 2 from the conductor 2 when the igniter 7 is activated, the conductor sections 3a, 3b subsequently serving to limit the distance for the separating piston 8 and therefore the fixing of the conductor ends by the screws is particularly cheap.
- the step of the piston is oblique (frustoconical), forces act on the conductor sections 3a, 3b in their longitudinal direction, as a result of which the screws are again pressed laterally against the plastic.
- a current isolator 1 of the type described above can also be equipped with an additional isolating device for a signal line 18, as shown in FIG Fig. 3 is shown.
- This additional separating device generally becomes effective only after the conductor 2 has been separated in order to document the separation process and to initiate any subsequent steps.
- a separating piston 8 according to the invention in combination with the signal line 18 is shown in Fig. 4 shown.
- the separating piston 8 has a predetermined orientation to the conductor 2, which is ensured in the exemplary embodiment by tabs 16a, 16b.
- the signal line 18 has two ends 19a, 19b and a separating area 20.
- a pin 21 of the separating piston 8 engages in the separating area 20 of the signal line 18.
- the igniter 7 is ignited, the separating piston 8 separates the central section 12 of the conductor 2, and the pin 21 of the separating piston 8 tears through the signal line 18.
- the geometry of the separation area of the signal line 18 and the pin 21 is designed such that the conductor 2 is disconnected first and then the signal line 18 is separated.
- An embossed signal line 18 provides a more precise definition of the tear point.
- the separating piston 8 ensures the insulation between the conductor 2 and the signal line 18 before, during and after the separation process.
- the assembly is particularly advantageous in that the conductor loop of the signal line 18 protrudes downward from the upper part 5 after the encapsulation, the separating piston 8 with the O-ring 10 is inserted and the conductor loop of the signal line 18 on the interface between the upper part 5 and the lower part 6 and over the pin 21 of the separating piston 8 is bent, after which the lower part 6 is placed and screwed on.
- the signal line can be made in one piece.
- the signal line is a wire or a strand, which preferably has no insulation in the separation area and is also injected into the housing.
- the igniter 7 and the ignition line are also injected in the upper part, it is particularly advantageous if the signal line 18 is also injected in the housing, specifically in the lower part 6.
- the cables of the ignition line leave the upper part 5 parallel to the conductor level
- the cables of the signal line 18 leave the lower part 6 also parallel to the conductor level, particularly preferably the ignition line and the signal line exit in the same direction.
- a connector can also be attached here.
- the watertightness of this system can be achieved by a sealing ring - as shown above - mostly in combination with a (four-pin) waterproof connector or two (two-pin) waterproof connectors.
Abstract
Ein pyrotechnischer Stromtrenner (1), der ein Gehäuse mit einem Zünder (7) aufweist, welcher zum Trennen eines Leiters (2) einen im Gehäuse verschiebbaren Trennkolben (8) mit Druck beaufschlagt, hat weiters eine Signalleitung (18), die bei Auslösung auch unterbrochen wird. Für einen einfachen Aufbau ist erfindungsgemäß vorgesehen, dass die Signalleitung (18) als Schlaufe ausgebildet ist, in die ein Zapfen (21) des Trennkolbens (8) eingreift. Wenn der Stromtrenner (1) aus Oberteil (5) und Unterteil (6) zusammengesetzt und der Zünder im Oberteil mit umspritzt ist, ist bevorzugt auch die Signalleitung (18) mit dem Oberteil (5) mit umspritzt, wobei die Schlaufe an der Trennfläche zum Unterteil (6) austritt und zwischen Oberteil (5) und Unterteil (6) zum Trennkolben (8) geführt ist. In diesem Fall können die Signalleitung (18) und der Zünder (7) einen gemeinsamen Stecker zum Anschluss besitzen, wobei der Stecker Teil des Gehäuses sein kann. Die Signalleitung kann aber auch im Unterteil (6) mit umspritzt sein.A pyrotechnic current isolator (1), which has a housing with an igniter (7), which presses a separating piston (8) which can be displaced in the housing to separate a conductor (2), also has a signal line (18) which, when triggered, also is interrupted. According to the invention, for a simple construction, the signal line (18) is designed as a loop into which a pin (21) of the separating piston (8) engages. If the current isolator (1) is composed of the upper part (5) and lower part (6) and the igniter in the upper part is overmolded, the signal line (18) is preferably also overmolded with the upper part (5), the loop on the separating surface for Lower part (6) emerges and is guided between upper part (5) and lower part (6) to the separating piston (8). In this case, the signal line (18) and the igniter (7) can have a common plug for connection, the plug being part of the housing. The signal line can also be overmolded in the lower part (6).
Description
Die vorliegende Erfindung betrifft einen pyrotechnischen Stromtrenner, der ein Gehäuse mit einem Zünder aufweist, welcher zum Trennen eines Leiters einen im Gehäuse verschiebbaren Trennkolben mit Druck beaufschlagt, wobei bei Auslösung auch eine Signalleitung unterbrochen wird.The present invention relates to a pyrotechnic current isolator which has a housing with an igniter which, in order to separate a conductor, pressurizes a separating piston which is displaceable in the housing, a signal line also being interrupted when triggered.
Die Zunahme des Verkehrs und die damit einhergehenden Schadstoffemissionen der Fahrzeuge stellen vor allem im innerstädtischen Bereich mittlerweile ein großes Problem dar. Als mögliche Lösung sieht man derzeit Elektro- (BEV) und Hybridfahrzeuge, wobei für letztere der größte Zuwachs vorausgesagt wird. Der Vorteil der Hybridfahrzeuge ist, dass für die häufigen Anfahr- und Bremsvorgänge ein Motor/Generator-Element verwendet wird, das beim Anfahren einen hohen Wirkungsgrad hat und beim Bremsen die Energie wieder in den Stromspeicher rückführt. Dieser im Vergleich zu einem vollelektrischen Fahrzeug kleine Stromspeicher verfügt dennoch über einen sehr hohen Kurzschluss-Strom, der im Schadensfall zuverlässig abgeschaltet werden muss.The increase in traffic and the associated pollutant emissions from vehicles have become a major problem, especially in inner-city areas. Electric and hybrid vehicles (BEV) and hybrid vehicles are currently seen as a possible solution, with the greatest growth predicted for the latter. The advantage of hybrid vehicles is that a motor / generator element is used for the frequent starting and braking processes, which has a high degree of efficiency when starting and returns the energy to the energy storage when braking. This electricity storage, which is small compared to a fully electric vehicle, nevertheless has a very high short-circuit current, which must be reliably switched off in the event of damage.
Stromtrenner für automotive Anwendungen sind schon lange bekannt, typische Ausprägungen sind die PSS1 und PSS2 der Fa. Autoliv, deren prinzipieller Aufbau in der
Eine weitere Bauform ist in der
Das Thema des Auslösenachweises durch Öffnung einer Signalleitung ist nur unzureichend gelöst. Fa. Autokabel verwendet dazu einen Magnet im Trennkolben, der einen außenliegenden Magnetschalter auslöst. In PSS3 von Autoliv ist ein Signalkabel vorgesehen, das beim Trennvorgang zusätzlich zu dem Leiter durchtrennt werden soll. Hierbei ist eine Aufsatzplatte vorgesehen, welche eine Führung für die Signalleitung vorsieht. Das Durchtrennen des Signalkabels dient zum Nachweis des Durchtrennens des Leiters. Der Kolben hat für das Signalkabel eine vorspringende Nase, unter der das Signalkabel angeordnet ist. Zu beiden Seiten der Nase ist das Signalkabel in der Aufsatzplatte fixiert.The issue of tripping detection by opening a signal line has not been adequately resolved. Autokabel uses a magnet in the separating piston for this, which triggers an external magnetic switch. A signal cable is provided in Autoliv's PSS3, which is to be cut in addition to the conductor during the disconnection process. Here, a top plate is provided, which provides a guide for the signal line. Cutting the signal cable is used to prove that the conductor has been cut. The piston has a protruding nose for the signal cable, under which the signal cable is arranged. The signal cable is fixed in the top plate on both sides of the nose.
Nachteilig bei beiden Lösungen ist der zusätzliche Herstellungsaufwand, sei es der zusätzlich angebrachte Magnetschalter, sei es die Aufsatzplatte, die zusätzlich hergestellt und angebracht werden muss.A disadvantage of both solutions is the additional manufacturing effort, be it the additionally attached magnetic switch or the top plate, which has to be additionally manufactured and attached.
Es ist Aufgabe der vorliegenden Erfindung, den Aufbau des Stromtrenners zu vereinfachen und dadurch die Herstellungskosten zu verringern.It is an object of the present invention to simplify the construction of the current isolator and thereby to reduce the manufacturing costs.
Diese Aufgabe wird durch einen Stromtrenner der eingangs genannten Art erfindungsgemäß dadurch gelöst, dass die Signalleitung als Schlaufe ausgebildet ist, in die ein Zapfen des Trennkolbens eingreift.This object is achieved according to the invention by a current isolator of the type mentioned at the outset in that the signal line is designed as a loop into which a pin of the separating piston engages.
Eine Schlaufe lässt sich mit wesentlich weniger Herstellungsaufwand im Gehäuse anbringen. Es besteht aber bei einem normalen Kolben - auch wenn er eine Nase hat - die Gefahr, dass die Schlaufe in den geringen Spalt zwischen Kolben und Gehäuse gepresst wird und nicht durchtrennt wird. Infolge des Zapfens des Trennkolbens, der in die Schlaufe eingreift, wird dies jedoch zuverlässig verhindert.A loop can be attached to the housing with significantly less manufacturing effort. However, with a normal piston - even if it has a nose - there is a risk that the loop will be pressed into the small gap between the piston and the housing and will not be severed. As a result of the pin of the separating piston engaging in the loop, however, this is reliably prevented.
Die Trennvorrichtung ist dabei bevorzugt so ausgelegt, dass die Signalleitung erst nach Trennung des Leiters durchtrennt wird. Auf diese Weise ist es unmöglich, dass fälschlicherweise "Leiter getrennt" signalisiert wird.The separating device is preferably designed such that the signal line is only cut after the conductor has been separated. In this way it is impossible that "conductor separated" is incorrectly signaled.
Nach Durchtrennen des Leiters und Durchtrennen der Signalleitung dient vorzugsweise der Kolben als Isolierung sowohl für den unterbrochenen Leiter als auch für das unterbrochene Signalkabel. Auf diese Weise ist es unmöglich, dass die Signalleitung die Trennstelle des Leiters überbrückt.After severing the conductor and severing the signal line, the piston preferably serves as insulation for both the interrupted conductor and the interrupted signal cable. In this way it is impossible for the signal line to bridge the separation point of the conductor.
Wenn die Signalleitung ausreichende mechanische Stabilität aufweist, also ausreichend dick ist, genügt es oft, wenn der Trennkolben nur dadurch lagefixiert ist, dass der Zapfen in die Schlaufe eingreift. Ansonsten ist es zur Lagefixierung bevorzugt, dass der Trennkolben durch zumindest einen Steg gegenüber dem Leiter positioniert ist.If the signal line has sufficient mechanical stability, i.e. is sufficiently thick, it is often sufficient if the separating piston is only fixed in position by the pin engaging in the loop. Otherwise, it is preferred for fixing the position that the separating piston is positioned relative to the conductor by at least one web.
Eine vorteilhafte Ausführungsform der Erfindung besteht darin, dass das Gehäuse aus einem Oberteil und einem Unterteil zusammengesetzt ist, wobei der Zünder mit dem Oberteil mit umspritzt ist, wie dies aus
Die elektrische Kontaktierung des Zündkreises des Stromtrenners kann beispielsweise als Pin-Type- oder Leadwire-Variante erfolgen.The electrical connection of the ignition circuit of the current isolator can take place, for example, as a pin type or lead wire variant.
Besonders bei Leadwire Varianten, d.h. dem Herausführen der Kontaktstellen von Zünder und Leiter zu einem außen liegenden Stecker, ist es vorteilhaft, wenn auch zusätzlich die Zuleitung des Zünders mit umspritzt ist. Insbesondere in diesem Fall kann die Signalleitung einstückig ausgebildet sein.Especially with Leadwire variants, i.e. leading out the contact points of the igniter and conductor to an external connector, it is advantageous if the lead of the igniter is also overmolded. In this case in particular, the signal line can be formed in one piece.
Die Signalleitung kann mit dem Unterteil mit umspritzt sein. Auf diese Weise ist der Zusammenbau problemlos möglich, weil beim Aufsetzten des Unterteils auf den Oberteil, in dem sich der Kolben befindet, die Schlaufe um den Zapfen des Kolbens legt. Allerdings ist dann kein gemeinsamer Stecker für den Zünder, der im Oberteil ist, und die Signalleitung, die im Unterteil ist, möglich.The signal line can be overmolded with the lower part. In this way, the assembly is possible without any problems, because when the lower part is placed on the upper part in which the piston is located, the loop wraps around the piston pin. However, a common plug for the igniter, which is in the upper part, and the signal line, which is in the lower part, is then not possible.
Nach einer weiteren Ausführungsform der Erfindung ist daher vorgesehen, dass die Signalleitung mit dem Oberteil mit umspritzt ist, wobei die Schlaufe an der Trennfläche zum Unterteil austritt und zwischen Oberteil und Unterteil zum Trennkolben geführt ist. In diesem Fall kann der Zusammenbau so erfolgen, dass die Signalleitung aus dem Oberteil zunächst parallel zur Bewegungsrichtung des Kolbens austritt, dann der Kolben eingesetzt wird, worauf die Schlaufe um 90° auf die Trendfläche zwischen Oberteil und Unterteil gebogen wird und dadurch um den Zapfen des Kolbens zu liegen kommt. Danach kann der Unterteil angebracht werden.According to a further embodiment of the invention, it is therefore provided that the signal line is overmolded with the upper part, the loop emerging from the separating surface to the lower part and being guided between the upper part and lower part to the separating piston. In this case, the assembly can be carried out in such a way that the signal line first emerges from the upper part parallel to the direction of movement of the piston, then the piston is inserted, whereupon the loop is bent by 90 ° onto the trend surface between the upper part and lower part and thereby around the pin of the Piston comes to rest. Then the lower part can be attached.
Eine günstige Weiterbildung besteht darin, dass bei dieser Ausführungsform die Signalleitung und der Zünder einen gemeinsamen Stecker zum Anschluss besitzen. Dies sorgt für einen wirtschaftlicheren Herstellungsprozess und wird unter anderem auch dadurch ermöglicht, dass keine zusätzliche Aufsatzplatte wie bei PSS3 von Autoliv erforderlich ist. Besonders günstig ist es, wenn dabei der Stecker Teil des Gehäuses ist.A favorable further training is that with this Embodiment the signal line and the igniter have a common connector for connection. This ensures a more economical manufacturing process and is made possible, among other things, by the fact that no additional top plate is required as with PSS3 from Autoliv. It is particularly favorable if the plug is part of the housing.
Bei Leadwire-Ausführung ist bevorzugt, wenn sowohl die Signalleitung als auch die Zündleitung parallel zur Leiterebene aus dem Gehäuse austreten. Dies ist für einen Platz sparenden Einbau günstig und kann sowohl angewendet werden, wenn die Signalleitung im Oberteil mit umspritzt ist, als auch, wenn sie im Unterteil mit umspritzt ist.In the Leadwire version, it is preferred if both the signal line and the ignition line emerge from the housing parallel to the conductor level. This is favorable for a space-saving installation and can be used both when the signal line is overmolded in the upper part and when it is overmolded in the lower part.
Die Signalleitung kann viele Querschnittsformen haben, es wird jedoch ein rechteckiger Querschnitt bevorzugt verwendet. Dadurch kommt die Signalleitung um den Zapfen herum plan zur Anlage.The signal line can have many cross-sectional shapes, but a rectangular cross-section is preferably used. This means that the signal line around the pin comes to rest flat.
Anhand der beiliegenden Zeichnungen wird die vorliegende Erfindung näher erläutert. Es zeigt:
Gemäß
Um zu verhindern, dass die abgetrennte Platine wieder in Kontakt gelangt, ist es notwendig, dass die Platine nach Auslösung des Stromtrenners 1 durch Strukturelemente im Unterteil 6 festgehalten wird. Diese Strukturelemente können beispielsweise noppenartig ausgebildet sein.In order to prevent the separated circuit board from coming into contact again, it is necessary for the circuit board to be held in place in the
Der Trennkolben 8 weist vorzugsweise eine konkave Schneidfläche auf, die ein sauberes Trennen des Leiters 2 ermöglicht.The separating
Weiters wird ein sauberer Trennvorgang dadurch ermöglicht, dass der Leiter 2 außerhalb des Gehäuses eine größere Breite als an den Trennstellen besitzt.Furthermore, a clean separation process is made possible in that the
Abweichend dazu werden der Oberteil 5 und der Unterteil 6 durch Schrauben 13a, 13b zusammengehalten, welche durch den Leiter 2 führen und somit nicht nur den Leiter 2 fixieren und die Gehäusehälften zusammen halten, sondern diese auch verstärken. Dadurch können zusätzliche metallische Verstärkungen entfallen. In den Löchern 4a, 4b durch die Leiterabschnitte 3a, 3b kann eine Isolierung 14a, 14b den Kontakt zwischen den Schrauben 13a, 13b und den Leiterabschnitten 3a, 3b verhindern. Diese Isolierung kann Teil des Ober- bzw. Unterteils 5 bzw. 6 oder ein eigenständiger Teil sein.In a departure from this, the
Besonders bevorzugt werden die Schrauben 13a, 13b von der zünderfernen Seite eingesetzt, wodurch die Köpfe 15a, 15b der Schrauben 13a, 13b zu einer strukturellen Verstärkung des Unterteils 6 werden. Dadurch kann die beim Trennvorgang durch den Trennkolben 8 ausgestanzte Platine 12 sicher aufgefangen werden.The
Die Auffangkammer 16 für die Platine 12 ist konisch, wodurch beim Abbremsen der Platine 12 (und ggf. des Trennkolbens 8) ein Biegemoment auf die Schrauben 13a, 13b erzeugt wird und diese als strukturelle Verstärkung dienen. Durch dieses Biegemoment werden die Schrauben in Querrichtung gegen den Kunststoff gepresst, wodurch deren axiale Haltekraft erhöht wird. In dieser Bauform können die Schrauben 13a, 13b auch von der Zünderseite eingesetzt sein.The collecting
Als Schrauben sind Schrauben mit Kunststoffgewinde bevorzugt. Diese sind durch im Vergleich zu metrischen Schrauben große Steigung, deutlich mehr Material zwischen den Gewindegängen und eine weitgehend axiale Belastung des Trägermaterials gekennzeichnet. Besonders bevorzugt sind Schrauben mit Auszugskräften von mindestens 500 N. Die Schrauben können mit einer Sicherung gegen selbsttätiges Lösen (etwa bei Vibration) ausgestattet sein, beispielsweise durch Zahnungen oder Rippen am Schraubenkopf.Screws with a plastic thread are preferred as screws. Compared to metric screws, these have a large pitch, significantly more material between the threads and one largely characterized axial loading of the carrier material. Screws with pull-out forces of at least 500 N are particularly preferred. The screws can be equipped with a safeguard against automatic loosening (for example in the event of vibration), for example by serrations or ribs on the screw head.
Die Schrauben können am Kopf eine Kontur zur Übertragung des Eindreh- und Anzugsdrehmoments besitzen, die beim Erreichen eines definierten Drehmoments unwirksam wird, etwa durch Abreißen eines Teils des Kopfes. Dadurch wird ein Zerlegen wirkungsvoll verhindert.The screws on the head can have a contour for transmitting the screwing-in and tightening torque, which becomes ineffective when a defined torque is reached, for example by tearing off part of the head. This effectively prevents disassembly.
Zum Erreichen einer Wasserdichtheit, insbesondere auch nach dem Schuss, ist eine Dichtung 17 vorgesehen, diese wird besonders bevorzugt auf den Leiter 2 aufgespritzt und besteht aus üblichen Dichtmaterialien, beispielsweise EPDM oder TPE mit ca. 70 Shore, auch hier hilft die Fixierung der Leiterabschnitte 3a, 3b während und nach dem Trennvorgang durch die Schrauben 13a, 13b zur Gewährleistung der Dichtheit.To achieve watertightness, especially after the shot, a
In
Ein Stromtrenner 1 der oben beschriebenen Art kann auch mit einer zusätzlichen Trennvorichtung für eine Signalleitung 18 ausgestattet sein, wie dies in
Der Trennkolben 8 weist eine vorgegebene Orientierung zum Leiter 2 auf, die im Ausführungsbeispiel durch Laschen 16a, 16b sichergestellt ist. Die Signalleitung 18 besitzt zwei Enden 19a, 19b und einen Trennbereich 20. In den Trennbereich 20 der Signalleitung 18 greift ein Zapfen 21 des Trennkolbens 8 ein. Bei Zündung des Zünders 7 trennt der Trennkolben 8 den mittigen Abschnitt 12 des Leiters 2, und der Zapfen 21 des Trennkolbens 8 reißt die Signalleitung 18 durch. In der bevorzugten Ausführung ist die Geometrie von Trennbereich der Signalleitung 18 und Zapfen 21 so ausgelegt, dass zunächst der Leiter 2 und erst danach die Signalleitung 18 getrennt wird. Eine Prägung der Signalleitung 18 sorgt für eine genauere Definition der Abrissstelle.The
Der Trennkolben 8 sorgt vor, während und nach dem Trennvorgang für die Isolierung zwischen Leiter 2 und Signalleitung 18.The
Besonders vorteilhaft erfolgt der Zusammenbau dadurch, dass die Leiterschleife der Signalleitung 18 nach der Umspritzung aus dem Oberteil 5 nach unten absteht, der Trennkolben 8 mit O-Ring 10 eingesetzt und die Leiterschleife der Signalleitung 18 auf die Trennfläche zwischen Oberteil 5 und Unterteil 6 und über den Zapfen 21 des Trennkolbens 8 gebogen wird, wonach der Unterteil 6 aufgesetzt und angeschraubt wird.The assembly is particularly advantageous in that the conductor loop of the
Bei einer sogenannten Leadwire-Ausführung, d.h. dem Herausführen der Kontaktstellen von Zünder 7 und Signalleitung 18 zu einem außenliegenden Stecker kann die Signalleitung einstückig ausgeführt werden. In diesen Fall handelt es sich bei der Signalleitung um einen Draht oder eine Litze, die im Trennbereich bevorzugt keine Isolierung aufweist und im Gehäuse mit eingespritzt ist.In a so-called leadwire version, i.e. leading out the contact points of
Weiters ist es bei Leadwire-Varianten, wo der Zünder 7 und die Zündleitung im Oberteil mit eingespritzt werden, besonders vorteilhaft, wenn auch die Signalleitung 18 im Gehäuse mit eingespritzt wird, und zwar im Unterteil 6.Furthermore, in the case of lead wire variants, where the
In einer bevorzugten Variante verlassen die Kabel der Zündleitung den Oberteil 5 parallel zur Leiterebene, und die Kabel der Signalleitung 18 verlassen den Unterteil 6 ebenfalls parallel zur Leiterebene, besonders bevorzugt erfolgt der Abgang der Zündleitung und der Signalleitung in gleicher Richtung. Bei Bedarf kann hier auch gleich eine Steckverbindung angebracht werden.In a preferred variant, the cables of the ignition line leave the
Die Wasserdichtheit dieses Systems kann durch einen Dichtring - wie oben dargestellt - erreicht werden, zumeist in Kombination mit einem (vierpoligen) wasserdichten Stecker oder zwei (zweipoligen) wasserdichten Steckern.The watertightness of this system can be achieved by a sealing ring - as shown above - mostly in combination with a (four-pin) waterproof connector or two (two-pin) waterproof connectors.
Claims (13)
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ATA50748/2018A AT521345B1 (en) | 2018-09-02 | 2018-09-02 | Pyrotechnic isolator |
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Publication number | Priority date | Publication date | Assignee | Title |
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DE102004023415A1 (en) | 2003-07-29 | 2005-03-31 | Dynamit Nobel Ais Gmbh Automotive Ignition Systems | Pyrotechnically driven separating device for separating solid, compact materials |
WO2012025272A1 (en) | 2010-08-27 | 2012-03-01 | Auto-Kabel Managementgesellschaft Mbh | Electrical disconnecting device and method for the electrical isolation of connecting parts with the aid of an isolating device |
WO2017066816A1 (en) | 2015-10-19 | 2017-04-27 | Hirtenberger Automotive Safety Gmbh & Co Kg | Pyrotechnic isolating apparatus |
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DE10111252A1 (en) * | 2001-03-09 | 2002-09-26 | Daimler Chrysler Ag | Arrangement for protecting loads in vehicle electrical circuits, has trigger unit with semiconducting elements in pyrotechnic charge for igniting charge to open isolating element |
DE102010045726B4 (en) * | 2010-09-07 | 2013-01-10 | Fele Gmbh & Co. Kg | Safety device and method for producing a safety device |
DE102012013491B3 (en) * | 2012-07-09 | 2013-09-26 | Auto-Kabel Managementgesellschaft Mbh | Electrical disconnector device for disconnecting 50V battery and electric motor of e.g. pure electric car in case of accident, has disconnector formed of permanent magnet, and sensor arranged outside housing |
DE102017207736B3 (en) * | 2017-05-08 | 2018-08-23 | Leoni Bordnetz-Systeme Gmbh | Pyrotechnic circuit breaker and supply network with a pyrotechnic circuit breaker |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004023415A1 (en) | 2003-07-29 | 2005-03-31 | Dynamit Nobel Ais Gmbh Automotive Ignition Systems | Pyrotechnically driven separating device for separating solid, compact materials |
WO2012025272A1 (en) | 2010-08-27 | 2012-03-01 | Auto-Kabel Managementgesellschaft Mbh | Electrical disconnecting device and method for the electrical isolation of connecting parts with the aid of an isolating device |
WO2017066816A1 (en) | 2015-10-19 | 2017-04-27 | Hirtenberger Automotive Safety Gmbh & Co Kg | Pyrotechnic isolating apparatus |
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AT521345A4 (en) | 2020-01-15 |
AT521345B1 (en) | 2020-01-15 |
EP3618089B1 (en) | 2021-04-14 |
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